Metal-turning machine



No. 6|7,408. Patented Ian. [0, I899.

F. SCHULZE.

METAL TURNING MACHINE.

(Application filed Aug. 14, 1897.) (N0 Modal.) 7 Sheets-Shoot l.

In: ngmms PETERS c0, PHoraurna. wAsmNuToN. u. c.

Patented Jan. l0, I899.

F. SCHULZE.

METAL TURNING MACHINE. (Ajaplication filed Au 14, 1897.

(No Model.)

BMW to 7 Sheets-Sheet 2.

No. 6l7,408.

F. SBHULZE.

METAL TURNING MACHINE.

(Application filed Aug. 14, 1897.)

(No Model.)

Patented Jan. I0, 1899.

w 7 Sheets-Shaet 3.

Patented Ian. l0, I899.

F. SCHULZE.

. METAL TURNING MACHINE.

(Application' filed Aug; 14, 1897.)

7 Sheets$heet 4. v

(No Model.)

TH: KRIS PETERS cu. Puorouma, WASHINGTON, u. c.

N0. 6l7,408. Patented Ian. 10, 1899. F. SCHULZE.

METAL TURNING MACHINE.

(Application filed. Aug. 14, 1897.)

(No Model.) 7 Sheets-Sheet 5. v

f &

Napalm-40s. Patented lah. I0, I899. F. scHuLzE. METAL TURNING MACHINE(Applicatibn filed. Aug. 14, 189 7.) (No Model.) 7 Sheets-Sheet B.

fi IIII? Q F272 0 7ZZLQ I E JWQMM W,

Patented Jan. .|0,. I899.

F. SCHULZE. METAL TURNING MACHINE.

(Application filed Aug. 14, 1897.)

7 Sheets-Sheet 7.

(No Model.)

V UNITED STATES PATENT OEEroE.

FREDERICK SCHULZE, OF CLEVELAND, OI-IIO.

METAL-TURNING MACHINE.

SPECIFICATION forming part of Letters Patent No. 617,408, dated January10, 1899.

Application filed August Toall whom it may concern.-

Be it known that I, FREDERICK SoHULzE, a citizen of the United States,residing at Cleveland, in the county of Cuyahoga and State of Ohio, haveinvented certain newand useful Improvements in Metal-Turning Machines;and I do hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

My present invention is in a sense an improvement upon the machinedescribed and claimed in Letters Patent No. 578,777, granted to me March16, 1897, although the machine as shown is not, strictly speaking,ascrewmachine, simply because no means are shown for reversing the motionof the live-spindle. The mere substitution, however, of thelivespindle-operating mechanism shown in said prior patent or any otheranalogous mechanism for the corresponding mechanism shown in the presentdrawings will make a screw-machine out of it,'and obviously suchsubstitution may be made by any skilled mechanic.

The object of the present invention is to increase the capacity ofmetal-turning machines whether the live-spindle is capable of rotationin one or both directions.

The invention relates, first, to a movable tool-head which is used inlieu of the toolholding turret commonly found in machines of thischaracter, and also to the mechanism whereby this tool-head isautomatically operated to bring the different tools into proper relationwith the work, and this part of the invention is not limited in its useto a lathe having its other mechanism constructed in any particularmanner.

The invention also relates to means for quickly changing from the fastto the slow motion, and vice versa, also to certain mechanism forstopping the cutting of the work at any time without necessarilystopping the machine, and also to certain other changes in andmodifications of the mechanism shown and described in said prior patentin the nature of improvements thereon.

The machine shown and containing my present invention is in manyrespects, and except as hereinafter specified and fully de- 1897. SerialNo. 648,197. on model.)

' scribed,substantially like the machine shown and described in saidprior patent, to which patent reference is made for a more completedescription of the old parts of the machine. In the drawings, Figure 1is a front elevation of my improved machine. Fig. 2 is a rear elevation.Fig. 3 is a plan view. Fig. 4 is a sectional end elevation on line 4 4:of Fig. 1. Fig. 5 is a sectional end elevation on line 5 5 of Fig. 2.Fig. 6 is a sectional rear view of the tool-head slide and associatedmechanism on line 6 6 of Fig.3. Fig. 7 is a detached perspective view ofthe rod g Fig. 8 is a sectional end view on line 8 8 of Fig. 1. Fig. 9is a top view of the eccentric disk Q, and Fig-10 is an end view of saiddisk. Fig. 11 is a longitudinal vertical sectional view of certainmechanism on shaft .E. Fig. 12 is a similar View of a drum secured onshaft E. Fig. 13 is an end view of one of the disks @3 and Fig. let isan end view of the inclosed drum e. a

Referring to the parts by letters, A represents the framework of themachine.

B represents the tubular live-spindle.

E represents the main driving-shaft, and K a supplemental driving-shaft.

The usual tool-holding turret is not found in the present machine. Inits place is a sliding tool-head G, which is movable in a pathtransverse to the axis of the live-spindle. As shown, this head movesvertically; but this is a matter of preference. The head is providedwith a plurality of tool-sockets g arranged with their centers in avertical plane which passes through the axis of the livespindle. Five ofthese sockets are shown, but less or more may be provided, as desired,and one, two, or more of these sockets may be utilized for any job. If,for example, only two tools are needed for a job, they are placed in thetwo upper sockets, and after they have been successively used the headmay be dropped to its normal position preparatory to using them again.It is not necessary as it is with a turret-machine that the tool-holdingdevice be moved through its entire path of possible travel after it hasbeen started and before it can return to its starting-point. Inautomatic turret-lathes as commonly con.- structed one piece of work isfinished for each complete revolution of the main shaft,

because the turret must make a complete rotation before the first toolcan be in place for the succeedin g operation, while in my machine,owing to the capacity of the toolhead to move back to the starting-pointfrom any position, much time may be saved when some of the tools are notused. Thus, for ex ample, if but two tools are used, as is frequentlythe case, there may be a saving of substantially three-fifths of thetime or more if the tool-head has more that five tool-sockets. Thisobviously results in a great saving of time, wherefore the machine has agreater capacity than a turret-machine can have, and this increasedcapacity of the machine is due to the fact that when a piece of work isfinished the tool-head may be dropped to its starting-point immediately.

The tool-head is mounted in suitable guideways on the face of thetool-head slide 9, which is movable horizontally toward and from thelive-spindle in suitable guides in the saddle g This saddle is securedto the bed of the machine in any well-known man ner. The slidingtool-head is held in the different positions necessary to maintain thedifferent tools in proper relation to the Work by a spring-bolt J, whichis mounted in the slide g directly behind the tool-head. Its end, whichis slightly tapered, enters correspondingly-shaped bolt-sockets g in therear side of the tool-head, the spring j acting to force said bolt intosaid sockets. The bolt is withdrawn by a lever j which is pivoted to theslide g, its upper end engaging with a lugj on the bolt. Its lowerend,when the slide 9 is moved backward, strikes a fixed lug g on the saddle,whereby said lever is rocked, with the result of withdrawing the bolt Jfrom the bolt-socket g. The tool-head is moved upward step by step andis held up while the bolt J is not in service for this purpose by acylindrical rod which rod is vertically movable through a hole in thesaddle and in a boss a on the bed a. A finger g projects at right anglesfrom the upper end of the rod and is adapted to engage beneath any oneof the pins 9 which project horizontally one above another from therearside of the toolhead. This rod is held so that the finger is in linewith the pins by a coil-spring g, which surrounds its lower end, one endof said coil-spring being secured to the boss a, while the other end isconnected with the rod 9 The action of the spring is to turn the rod inits socket until the finger g strikes the side of the slide, at whichtime the finger is in the same vertical plane with the fingers upon thetool-head. This rod is moved upward periodically by a cam 7& secured tothe shaft K. The rod is turned upon its axis, so as to draw its upperfinger to one side of the line of fingers on the tool-head by means of acam n whichis rigidly connected with the shaft E. The tool-head slide ismoved toward and from the live-spindle by substantially the samemechanism which is fully described in the prior patent named for movingthe turret-slide.

The part of the mechanism which is above described operates as follows:Supposing that at the beginning of the operation the parts are in therelative position shown in Figs. 1 and 6, the tool-slide is movedforward to bring the tool in the upper tool-socket into engagement withthe work. As it begins this movement the spring-bolt J is released fromthe retractile action of the leverj and is moved forward by its springentering the socket in the toolhead before the upper pin g passes off ofthe finger g Vhen the tool has done its work, the slide is movedbackward. The cam 7t strikes the lower end of the rod 9 lifting thesame, and it lifts the tool-head and holds it up until the tool-headslide again moves forward and the spring-bolt enters the sec ondbolt-socket g in the toolhead. The cam k passing from under the rodpermits the rod to fall, wherefore when the tool-head slide againreturns to the position shown the second pin on the tool-head is abovethe finger g on the rod. These operations are repeated until the severaltools have acted upon the work. Then the cam or, which is beveled on oneside, as shown in Fig. 3, strikes an arm on the lower end of said rod,turning the rod in its socket, and thereby moving the finger 9 out ofline with the pins g. The tool-head thereupon drops to its originalposition, its lower end resting on a fixed support a. More than one ofthe cams a may be secured to the shaft E in such position that duringone revolution of the shaft E the rod may be turned two or more times,as desired, with the result of allowing the tool-head to drop an equalnumber of times to its original position.

In a machine of this class it is necessary in order to Work the machineto its full capacity that every motion except the actual cutting motionsshall be done quickly, the cutting motions being necessarily slow. Inorder to do this, the change from the fast to the slow motion, and viceversa, should be very quickly accomplished. There should be no stoppagebetween motions, for this is liable to bring about inaccurate timing,and as a result the tool might jam into the work. To accomplish thisdesirable result, I have provided mechanism in which the slow motion isconstantly running, but is overtaken, so to say, at the proper time bythe fast motion. The slow motion of both of the shafts E and K iseffected by mechanism which is substantially like that shown anddescribed in said prior patent. Some parts of its mechanism it isnecessary to here describe in order that my improvement relating to thispart of the machine may be fully understood.

(2 is a pulley which is loosely mounted upon the shaft E and isconstantly driven by a belt, which is not shown. Mounted upon one faceof this pulleyin dovetailguides which extend transversely of the shaftis the adjustable t h. A.

eccentric disk Q, the function of which is the same as the adjustableeccentric disk shown in the prior patent. The eccentricity of this diskis varied by means of 'a rectangular block V, the upper and lower facesof which are parallel and inclined from the front to the rear face ofsaid block, which block is loosely mounted upon shaft E and passesthrough a rectangular opening (1 in the eccentric disk, the upper andlower faces of which are inclined from the front -to the rear face ofsaid disk. When this block is moved to the left, as shown in Fig. 11,the eccentricity of the disk is increased, and it is moved to the leftby mechanism substantially the same as is shown in said prior patenttowit, a lever WV and its operating mechanismand it is moved to the rightto decrease the eccentricity by a spring '0, inclosed within said loosepulley e surrounding the shaft and thrusting endwise against a collar efastened to the shaft, and against the said block. On the opposite faceof this loose pulley is the fixed member of a clutch, consisting of oneor more clutch-jaws e. Mounted loosely upon the hub of this pulley isthe movable clutch member 6 having jaws 6 adapted to engage with thejaws on the pulley.

e and 6 represent two gears which are likewise mounted loosely on theshaft E, but are rigidly connected with each other. Laterally-projectingpins 6 secured to the movable clutch member 6 enter holes in the geare", whereby said member and gears are compelled to revolve together,although the clutch member is permitted to move longitudinally upon theshaft.

e represents a gear which is keyed to the shaft E.

represents a gear formed on a sleeve which is rigid with the disk R,which disk is part of the silent-feed mechanism shown and described insaid prior patent, which sleeve and disk are loose upon the shaft K. 76and k are respectively gear and pinion, which are keyed to the shaft Kand mesh, respectively, with the gears e and a. It will be understood bythose familiar with the construction of this silent-feed mechanism thatthe disk R, to which the gear 1" is made fast, is capable of being movedforward faster than it could be by the other parts of the silent feedinother words, that the parts of the silent-feed mechanism by which thegear 7* is rotated do not prevent it from rotating faster. When,therefore, by the operation of the clutch the gears e 6 are connecteddirectly to the pulley 6 fast motionis transmitted fromthe said pulleyto the shafts through the gears e kl, and e. In this case, although thesilent feed continues to operate, the disk R and gear 4* are moved alongby gear a faster than they would otherwise be moved. hen by theoperation of the clutch said gears e e are disconnected from the pulley6 then slow motion is transmitted to the shafts through the silentfeedmechanism and the entire train of gears 1", 6, e 70, R and c. There istherefore no stopping of the motion of-the shafts which might disarrangethe timing of the moving parts. When the fast-moving mechanism is thrownin,it overtakes the slow-movin g mechanism, and the shafts are thereforedriven at the faster speed by less than the entire train of gears. Whenthe fast-moving mechanism is thrown out, the speed of the shaftsslackens until it corresponds with the speed at which said shafts willbe driven by the slow mechanism, whereupon said slow mechanism(including the entire train of gears) continues to rotate the shafts atthis rate.

moving mechanism contains a part near the shaft-via, disk R andconnected gear 0- This mode of operation is possible, because the slow-.

which may move forward faster than the other parts between it and thepulley-via,

the other parts of the so-called silent-feed. The movable clutch memberis moved, so as to cause the engagement and disengagement of it with theloose pulley by substantially the same mechanism which is shown in theprior patent as the means for operating the belt-shipper thereinnecessarily employed. This mechanism consists of a fork Y, secured to asliding bar 3 a coil-spring g surrounding said bar and tending to moveit in the direction which will cause the clutching of the movable clutchmember. This bar is moved in the contrary direction by dogs 2',adjustably secured to the edge of a drum I, which drum is rigidlysecured to the shaft E. This so-called drum I is of novel form,

which greatly facilitates the fastening of the dogs thereto at anydesired point. This drum consists of two disks 2' f, both fast to theshaft and having at their outer edges, respectively, cylindrical flanges6', which extend toward each other. One plate '0 lies between the disksand inside of and in contact with said flange. -Another plate '5 incontact with the outer peripheries of said'disks, is fastened to theinner block by a screw-bolt t". These two plates and bolt form a clampand there may be as many of these clamps as desired. The 'dogs t' aresecured to the outer clamp-plate i The lever WV, which, as beforestated, operates the block V, has a bar to secured to it, which passesthrough a guide-hole in the frame, and a roller 10 on its outer endengages with the dogs as, secured to a flange X on the drum I. Thesedogs may be of any shape and may be arranged in such manner as to causethe bar-w to be moved at the proper times and to the extent desired tovary the eccentricity of disk Q, substantially as shown in said priorpatent. The lower end of the lever W instead of being pivoted to afixedpoint is provided with a pivot-pin w which lies in a horizontal slot ain a fixed plate a. This pivot is normally prevented from movement bythe end of a lever c,which holds said pivot in the-end'of said slot.This lever is rigidly secured to a transverse rock-shaft 0, having anoperating-handle 0 within easy reach of the operator. The end of saidlever is cam-shaped, substantially as shown,whereby it will as it ismoved down move the pivot back to the end of the slot aiwhich, asstated, is the position in which lever "W is operative for the describedpurpose. lVhen this lever end is raised, the lever XV will no longerpress the block V forward, but, on the contrary, the spring 12 ispermitted to act to push the block in the contrary direction,whereuponthe disk Q comes into a position concentric with the shaft. \Vhen inthis position, it has no effect upon the silent-feed mechanism, andtherefore all of the feed movements of the various parts stop, (providedthe fast movement is not connected up by the clutch e Since the fastmovement is not intended to be connected up when the machine is cutting,the operation of lever c to release the pivot of lever \V causes thecutting action of the machine to stop.

Another improvement embodied in the machine relates to the constructionof the drum upon which the adjustable dogs are secured. The drum 6,which carries the dogs for operating the cutting-off tool-slide P, isconstructed according to my improvement. It consists of an internal drumc which is to be keyed to the shaft E, and two disks a, loose on theshaft, each having a cylindrical flange 6 These disks are placed atopposite ends of the drum 6", with the flanges embracing said drum, andthe disks in which the segment-shaped slots 6 are formed are bolted tothe drum 6 in any desired relation to it and to each other.

The two disks r 'r of the silent-feed m echanism are oscillated in themanner and with the results described in said prior patent by two linksr r", the lever S, and an eccentricstrap T, which embraces the eccentricdisk.

Q, an arm I, which is rigidly connected with said strap, being connectedwith the opposite end of the lever S, to which the said links areconnected.

\Vhen the pulley is not connected by the described clutch to the gears 6c the silent feed is working alone and the slow motion of the parts isgoing on; but when the said pulley is clutched to the said gears themechanism for the fast motion is thrown inthat is to say, the gears e eare connected with the drivingpulley e and the fast motion ensues,overtaking, as it were, the slow-motion mechanism, which, nevertheless,continues to act. \Vhen the parts are unclutched, the fast motion stops5 but the parts are moved along without any stop by the slow-motionmechanism.

Having described my invention, I claim- 1. In a metal-turning machine,in combination, a tool-head slide, a sliding tool-head mounted upon saidslide and having a plurality of tool-sockets in its outer face and aplurality of corresponding bolt-sockets in another face, a spring-boltcarried by the slide forengagementin said bolt-sockets,and meansoperated by the backward movement of the slide for withdrawing saidbolt, substantially as specified.

2. In a metal-turning machine, atool-head slide, a sliding tool-headmounted on the front end thereof, and movable in a path transverse tothe path of the tool-head slide, said toolhead having a plurality oftool-sockets and corresponding bolt-sockets, a spring-lock bolt forengagement in said bolt-sockets, a lever pivoted to the slide for movingsaid bolt, and a lug for engaging with the lever when the slide is movedbackward, substantially as specified.

In a metal-turning machine, in combina tion, a toolhead slide, a slidingtool-head mounted upon one end thereof and having a plurality oftool-sockets and corresponding projecting pins, with a reciprocating rodfor engaging with said pins, mechanism for operating said rod, and alocking device for holding said tool-head in the various positions towhich it is moved, substantially as specified.

4:. In a metal-turning machine, in combination, a tool-head slide, asliding tool-head mounted upon one end thereof and having a plurality oftool-sockets and also a plurality of corresponding pins, a rod adaptedto move longitudinally upon its axis and having two fingers projectinglaterally therefrom, one of said fingers being adapted to engage withthe pins upon the tool-head, a cam for periodically moving said rodendwise, and a device engaging with the other finger on said rod forperiodically turning the rod upon its axis, substantially as described.

5. In a metal-turning machine, in combina tion, a tool-head slide, asliding tool-head mounted upon one end thereof and having a plurality oftool-sockets and also a plurality of corresponding pins, a rod adaptedto move longitudinally upon its axis and having two fingers projectinglaterally therefrom, one of said fingers being adapted to engage withthe pins upon the tool-head, a cam for periodically moving said rodendwise, and a device engaging with the other finger on said rod forperiodically turning the rod upon its axis, and a locking-bolt forholding the tool-head in its various positions, substantially asspecified.

6. In a metal-turningmachine, in combination, the live-spindle, atool-head slide movable toward and from it, a tool-head mounted andadapted to slide up and down upon the front end of said slide and havinga plurality of tool-sockets in its front face, one above another, aplurality of corresponding boltsockets,and a plurality of correspondinghorizontal pins, a spring-lock bolt, a device for retracting the samewhen the slide is drawn backward, a vertically-movable rod having twolaterally-projecting fingers, one of which is adapted to engage with thepins upon the tool-head, the main shaft, and a supplemental shaft, adevice carried by the latter .shaft for periodically moving the rodendwise, and a device on the main shaft for engaging with one of thefingers on said rod to turn said rod upon its axis,and a springfor-turning said rod backward when released by the lastnamed device,substantially as specified.

'7. In a metal-turningmachine, in combination, a main shaft, asupplemental shaft, a single loose driven pulley, mechanism which ispermanently connected with said pulley for imparting a slow movement tosaid shafts, mechanism for imparting a fast movement to said shafts,anda clutch for connecting and disconnecting the last-named mechanism toand from the pulley, the slow-moving mechanism containing a part nearthe shafts which may move forward faster than the other parts nearer thepulley, whereby the shafts may be turned by the mechanism fortransmitting the faster movement without disconnecting the mechanism fortransmitting the slower movement, substantially as specified.

8. In a metal-turning machine, in combination, a main shaft, asupplemental shaft, a single loose driven pulley, a silent feed operatedby and permanently connected with said pulley,the driven part of whichmaybe moved forward faster than the driving part, mechanism operated bythe driven part of said silent feed for turning said shafts, and aclutch adapted to connect the last-named mechanism directly with saidloose pulley without disconnecting the silent-feed mechanism,substantially as specified.

9. In a metal-tn rnin g machine, in combination, a shaft, a loosepulley, an eccentric disk mounted on one face of said pulley and adaptedto slide thereon transversely of its axis, a wedge-block movablelongitudinally of said shaft and adapted by such movement to vary theeccentricity of said disk, a spring for moving said block in onedirection, a lever for moving it in the opposite direction, and amovable pivot for said lever, substantially as specified.

10. In a metal-turning machine, in combination, a shaft, a loose pulley,an eccentric disk mounted on one face of said pulley and adapted toslide thereon transversely of its axis, a wedge-block movablelongitudinally ofsaid shaft and adapted by such movement to vary theeccentricity of said disk, a spring for moving said block in onedirection, a lever for moving it in the opposite direction, a pivot-pinfor said lever, a slot in which said pin is movable, and a device fortemporarily preventing such movement, .substantially as specified.

11. In a metal-turning machine, in combination, a shaft, a loose pulley,an eccentric disk mounted on one face of said pulley and adapted toslide thereon transversely of its axis, a wedge-block movablelongitudinally of said shaft and adapted by such movement to vary theeccentricity of said disk, a spring for moving said block in onedirection, a lever for moving it in the opposite direction, a pivot-pinfor said lever, a slot in which said pin is movable, and a leverhavingan eccentric end for moving said pivot-pin to and holding it in thedesired position, substan* tially as specified.

12. In a metal-turning machine, in combi nation, a shaft, a block fixedto the shaft, two disks loose on the shaft and having cylindricalflanges which surround said block, cams on the outer peripheries of saidflanges, said disks having segmental slots, and screws passing throughsaid slots and screwing into the block for adj ustably connecting thedisks and block, substantially as specified.

13. In a metal-turning machine, in combination, two disks 1' i securedthereto having cylindrical flanges t i which extend toward each other,clamps consisting of the plates 2' i which engage respectively with theinner and outer peripheries of said flanges, the screw-bolts i and dogssecured to the outer clamping-plates, substantially as specified.

In testimony whereof I affix my signature in presence of two witnesses.

FREDERICK SCHULZE.

